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Thu, 08 Jan 2026 21:17:25 -0800 (PST) Date: Fri, 9 Jan 2026 13:17:21 +0800 From: Jinchao Wang To: Matthew Wilcox Cc: Andrew Morton , David Hildenbrand , Zi Yan , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Gregory Price , Ying Huang , Alistair Popple , linux-mm@kvack.org, linux-kernel@vger.kernel.org, syzbot+2d9c96466c978346b55f@syzkaller.appspotmail.com Subject: Re: [PATCH] mm/migrate: fix hugetlbfs deadlock by respecting lock ordering Message-ID: References: <20260109034723.1342798-1-wangjinchao600@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Stat-Signature: 3wqombnc7sthntqu9o4smdhbjg49bm76 X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: F1AAB40009 X-Rspam-User: X-HE-Tag: 1767935846-958220 X-HE-Meta: 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 awQK4Sv+ 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Jan 09, 2026 at 04:06:22AM +0000, Matthew Wilcox wrote: > On Fri, Jan 09, 2026 at 11:47:16AM +0800, Jinchao Wang wrote: > > Link: https://lore.kernel.org/all/68e9715a.050a0220.1186a4.000d.GAE@google.com/ > > Link: https://lore.kernel.org/all/20260108123957.1123502-2-wangjinchao600@gmail.com > > Reported-by: syzbot+2d9c96466c978346b55f@syzkaller.appspotmail.com > > Suggested-by: Matthew Wilcox > > Signed-off-by: Jinchao Wang > > ... and by "Suggested-by", you mean "completely written by", right? > > Or did you change it in some way? Yes, it is completely written by you. I verified it against the syzkaller reproducer and reviewed the code logic. If you prefer, I am happy to update the attribution, for example by replacing Suggested-by with Co-developed-by, or by listing you as the author instead. I can also drop my patch if that is more appropriate. Please let me know what you prefer. Thanks.